Shipping container



July 26, 1966 J. s. HEISLER ETAL 3,262,628

SHIPPING CONTAINER lr-ici. l.

Filed Jan. 9, 1965 2 Sheets-Sheet 1 JEROME .S bfi/5l EK July 26, 1966 J.s. HElsLER ET AL SHIPPING CONTAINER 2 Sheets-Sheet 2 Filed Jan. 9. 1963lililflllllllld United States Patent O 3,262,628 SHIPPING CONTAINERJerome S. Heisler, Eric Glenn, and Anthony J. Starr, Wilmington, Del.,assignors to Container Corporation of America, Chicago, Ill., acorporation of Delaware Filed Jan. 9, 1963, Ser. No. 250,360 5 Claims.(Cl. 229-14) This invention relates to a new and improved container forliquids and other materials and especially for hazardous liquids andmaterials such `as chemicals of various kinds which yare corrosive oreasily contaminated if brought into contact with metal surfaces. Theinvention is concerned more particularly with an improved cornpositedrum that can be provided in any suitable shape such as cylindrical,cubical, etc., and which is especially useful for the shipping ofvarious kinds of acids, corrosive chemicals, food products, and thelike, in bulk in interstate commerce.

Containers -of the indicated' type not only have to be made to protectthe products carried thereby against contamination and corrosion, butthey must also be highly resistant to destruction. In fact if they varenot able to withstand the very severe tests required by the FederalInterstate Commerce Commission they are banned from interstate traic.The severity of these tests will be appreciated when it is noted thatamong other tests, the drum must successfully withstand without leakageor serious rupture, four foot drop tests on the top and bottom' edges,diagonally onto solid concrete, on the sidewall over a 2" X 6 timberresting on solid concrete, and on the closure or other vulnerable partsthereof onto solid concrete, and compression tests of over 1200 poundswithout buckling or a maximum deiiation of over one inch.

In view of their contents and the severity of the requirements they mustmeet in order to be used in interstate commerce, drums of the indicatedtype have been usually made of plywood or steel with a lining ofmaterial that is unaffected by the products carried thereby. The art,however, has been continuously investigating the possibility ofconstructing drums made of lighter and less expensive materials. Theobvious materials that might be capable of satisfying these tworequirements are paper and paper fibers, but there are certain inherentditliculties in the way of adapting such materials for the indicatedpurpose. The paper and paper bers are not resistant to liquids andespecially acids, which additionally can consume paper materialsrapidly. Attempts have been made to overcome this shortcoming of paperby providing it with linings or barriers of wax, plastic and metal foil.Such efforts however, have not been entirely successful, either becausethe protective material in the form it had to be used is not whollyimpervious, or is not mechanically strong enough to form a strong drum,`or cannot be used to provide a strong, leakproof drum capable ofsatisfactorily meeting and passing the aforesaid I.C.C. tests', or evensurviving the conditions to which it would be subjected in use.

The art tried to overcome these diiiculties by combining with a fiberdrum an inner lining of polyethylene. The usual forms of fiber drumswere found to be too weak to withstand the tests required by theInterstate Cornmerce Commission. When it was attempted to use separatethin walled polyethylene bags, the problem :of porosity of the liningbecame troublesome because of the thinness of the material and thediiculty of forming a nonporous, thin extruded polyethylene casing.Further, fatigue failures showed up in the heat seals and as the drumwas emptied the distortions caused in such a bag by its collapsingaggravated the shortcomings of such heat seals. Open end moldedcontainers of polyethylene were also tried with no better resultsbecause of stress failure `and porosity of the material in its formedcondition. To

Pice

close such a container necessitated a separate heat seal whoseapplication degraded the treated polyethylene and consequently nallyresulted in failure of such degraded material.

It is the primary purpose of the present invention to provide animproved composite container or drum constituted of paper fiber materialand plastic material, and constructed so as to be completely porosityfree and stress free and capable of being accepted by the InterstateCommerce Commission as a satisfactory liquid container for.

interstate shipments.

In accordance with the invention, there is provided a paper ber drum ofnovel construction having within the paper fiber body thereof, aseamless, molded, one piece collapsible plastic container which providescomplete protection for such body against the product contained there-The features and advantages of a drum embodying the invention willbecome more clear after a perusal of the following description when readin connection with the accompanying drawings, in which FIG. l is avertical sectional, broken View of a drum embodying the features of theinvention;

FIG. 2 is a vertical sectional View showing another embodiment of theinvention;

FIG. 3 is a partial, sectional View of a detail illustrating anothermethod of locking the outlet ange of the lplastic container to the drum;and

FIGS. 4 and 5 are views similar to FIG. 3 showing still further methodsof locking the outlet flange in position.

The drums illustrated in the drawings each have a minimum capacity offive gallons and may be made smaller or in substantially larger sizes,such as, 30, 55, etc., gallon sizes. The drum of FIG. 1 is composed of acylindricallyshaped body 10 constituted of kraft paper wound into amultiplicity of plies in the form of a tube and adhered together with asuitable plastic glue in accordance with known practice. It has beenfound, that for the purposes of the invention, the body 10 should bemade with a minimum of four plies of the kraft paper. Recessed withinthe ends of the body 10 are the top and bottom walls of the drum whichare constituted of elements pressure inserted into such ends. Asillustrated, the top wall is composed of a pan-shaped Imember made ofheavy kraft paper and having a disc body 11 of an area substantiallyequal to the interior cross-sectional area of the body 10 and to theperiphery of which is integrally connected an outwardly extending ange12 of substantial width in frictional engagement with the top endportion of the inner wall of body 10. Seated on the outer surface of thedisc body 11 of the pan-shaped member is a closure disc 13 ofsubstantial thickness and of an area substantially equal to that of suchdisc body so that the peripheral edge of such disc 13 snugly engages theinner root portion of the flange 12. The closure disc 13 is locked inposition in the pan-shaped member by a reinforcing ring or annularmember 14, the exterior surface of which is in frictional engagementwith the remainder of the flange 12 outwardly of such disc 13. In asimilar fashion the bottom wall of the dru-m is composed of a pan-shapedmember, closure,

disc 13 and reinforcing ring or `annular member 14'; the disc body 11'and ange 12 of such pan-shaped member being assembled with disc 13 andring 14 in a manner similar to that described with respect to similarparts in the top wall. f

The top and bottom closure discs 13, 13', respectively, are each made ofa plurality of plies of kraft paper bonded together with a suitableplastic cement known to the art. The thickness of such top and bottomclosure discs will depend on and will vary with the capacity andperformance requirements of the drum. Thus, a thickness of 0.1

-inch is adequate for a 5gal1on drum, while a thickness of 0.2 inch ismore suitable for -a 15-gallon drum. The top and bottom closure discsmay be secured in position within the pan-shaped members by adhering theouter edges thereof to the inner walls of such pan members by lines 15of a suitable plastic glue capable of permanently bonding such surfacestogether, and annular lines 16 of a similar glue may be utilized to bondthe outer edge portions ofthe outer surfaces of such closure discs tothe reenforcing rings 14, 14 which are also constituted of a pluralityof bonded plies of kraft paper. Y The thicknesses of the rings 14, 14are preferably greater than the thicknesses of their associated closurediscs 13, 13' and may have a substantially greater height than suchthickness. rl`he rings 14, 14 may be additionally adhered to the flanges12, 12' of the pan-shaped membersby lines of glue 17 and such fiangesmay be secured to the drum body 10 by lines of glue 18. Whether or notthe elements constituting the top and bottom walls are so adhered toeach other and to the drum body 10 by the aforesaid lines of glue, all`of such elements in addition to being pressure fitted within the endsof such drum body are permanently secured together in their assembledrelation on such body by a plurality of staples 19 driven through eachset of associated body end portion, flange and reenforcing ring as closeas possible to the closure disc associated therewith. The staples 19 areVpreferably of the type known as crown staples in that they arearcuately-shaped in crosssection and provide a convexly-shaped exteriorsurface. The staples 19 extend around the entire exteriors of the bodyend portions and are preferably substantial in number, being in suchnumber, for example as to be spaced apart a distance approximating twoto three times the length of such staples.

It will be understood from the foregoing that at each end of the body,such body end and its associated wall assembly are permanently joinedtogether into a unitary construction from which the parts cannot beseparated without the destruction of such parts. The plies in the rings14, 14' and the plies in the body 10 extend about the same -central axisof the body and therefore complement and rigidify each other; whichrigidity is further enhanced by the plies in the two closure discs 13,13 which extend at right angles to such axis. The crown type of staplesused in the rings 14, 14', flanges 12, 12 and body 10 further increasethe rigidity and strength of the body 10 at its ends and render lesslikely any possible failure of the same.

Positioned adjacent to the inner surface of the body disc 11 of thebottom pan-shaped member, are a pair of peripherally spaced vent holes32 which bring the wholly closed chamber defined by the above describedpaper drum casing into communication with the atmosphere to enable thedrainage out of such paper casing of any liquid that may haveinadvertently collected therein, and to facilitate the collapsing of theplastic container enclosed by such casing as such container is emptiedof the product packed therein. It has been found that two -vent holes ofabout 9/16 inch diameter `will accomplish the desired results.

Located within the `drum chamber formed by the above described body 10and top and bottom wall assemblies, or end walls, is a seamless, molded,one piece container 20 made of a plastic material suitable to thequalities of the product to be shipped in the drum. For example, it ispreferred that the container 20 be made of a suitable polyolefin, suchas polyethylene, if the contemplated product of the drum is to be acorrosive acid or a liquid that may be readily contaminated by contactwith metal, or impossible to store adequately in paper fiber. Theexterior configuration and the dimensions of the plastic containershould be substantially the same as the configuration and dimensions ofthe drum chamber so as to provide `a fai-rly snug fit preventingsubstantial movement of the container relative to the overpack duringhandling and shipment of the drum. The fit should not be so close,however, as to eliminate the presence of an air layer between thecontainer 20 and the overpack defined by the body 10 and the ends walls;such air layer being sufiicient tocushion the movements -of the filledcontainer relative to the overpack. This cushioning action is enhancedlby the fact that at the top and bottom ends of the container, andespecially the bottom end thereof which usually is subjected to shockimpact to a greater extent in normal handling, the plastic container 20is provided with end walls which are integrally joined to the bodyportion thereof by rounded portions which curve in cross-section througha angle so that such rounded portions span the right angled junctures ofthe casing body and top and bottom -walls (note the sectioned portion ofFIG. l of the drawings). There is thus provided at the top and bottomends of the container, an outer casing or overpack construction in whichvertical and horizontal members intersect at right angles, and in whichlining portions span such 90 angular intersections in a rounded fashion.It has been found that such construction provides ideal contours for theoverpack and liner in the critical top and bottom edges or corners ofthe container. The right angularly disposed overpack parts provide greatstrength at such container corners, and the rounded liner corners enablethe liner to maintain its integrity as a container even when theoverpack is ruptured by shock impact because the liner by reason of itsconfiguration at such corners may readily deflect and adjust itself tothe shock of such impacts. The walls of the container 20 are not 4thickenough so that the container per se can -be utilized as a means forshipping products in interstate commerce, and are preferably of suchthickness that the container will collapse as the product is beingwithdrawn therefrom. It has been found that a suitable preferredthickness for the walls of the plastic container to accomplish thepurposes of the invention is about 0.010 inch.

The container 20 is provi-ded in its top wall with at least one integraloutlet 22 which is preferably offset with respect to the central axis ofthe container and which extends up through an associated opening 25formed by aligned holes in the disc body 11 and closure disc 13 of thetop wall ofthe fiber overpack. The outlet 22 has a lower portion 23which extends up vertically from the top container wall 21 and throughsaid opening 25 and is provided with suitable means for retaining it inproper position with relation to the top wall of the overpack. Onesuitable means for accomplishing this purpose may be provided, as isshown in FIG. 1 of the drawings, by integrally molding on the upperperiphery of flange wall portion 23 and at a level adjacent to the outersurface of the fiber closure disc member 13, two or more projecting lugs24 constructed thereon so that the circular edge portion of the opening25 is snugly locked -between such top container wall 21 and the lugs 24.The lugs 24 are formed on the outlet 22 so that their outer ends justoverlie the edge of opening 25 an amount sufficient to provide aneffective lock with such edge, but not to such extent that they cannotbe drawn by force through the opening 25. The lugs 24 have substantialthickness providing them with sufficient rigidity to maintain such lockin the use of the drum, but retain a sufficient degree ofcompressiveness or flexibility to enable them to be forced through theopening 25 in the assembly of the drum. The outlet itself and the fibersof -the paper material of the closure disc 13 around the opening 25deflect to some degree to facilitate such passage of the lugstherethrough. The number of such lugs 24 are optional an-d may be morethan two, for example, four or more, and may even be continuously aboutthe outlet 22 in the form of a ange or ring. Further the ring may beseparate from the outlet and seated in a recess or locked in position onthe outlet by suitable projections or heads, as is illustrated by thering 24 and lbeads 26 in the outlet 22 shown in FIG. 3 of the drawings,and the snap ring 24 and annular recess 27 in the outlet 22" shown inFIG. 4 of the drawings.

In the constructions of FIGS. l, 3 and 4, the lugs 24, beads 26 andrecess 27, respectively, are located below a screw thread 31 provided onthe outlet for receiving any suitable cap or plug closure, such as thecap 30 of known construction. It is also within the contemplation of theinvention to extend such screw thread down to the top wall 21 of thecontainer 20 and to additionally screw on such thread suitable means forretaining the outlet in proper position relative to the top wall 13 ofthe overpack. Such extended screw thread may be of uniform configurationthroughout its length, or. may be provided, as is shown in FIG. 5 of thedrawings, at its lower end with a portion 31 of greater diameter toenable the retaining means to be readily'slipped over the upper end ofsuch screw thread and consequently to enable such means to be morequickly adjusted to proper position. The retaining means may beconstituted of any suitable internally threaded member and may beconstituted as shown in FIG. 5, of an annular plate or ring 28, theinner edge portion of which is split and formed on one side of suchsplit to provide a downwardly inclined leading edge 28 depressed fromthe plane of the ring approximately the thickness of one thread of theportion 31' and a progressively lesser inclination extending from suchleading edge 28 throughout a major portion of the circumference of suchinner edge portion. Thus the inner edge of the ring 28 is enabled tothreadedly engage one thread of the portion 31' and to be screwed downon such portion until the ring is properly adjusted with relation toWall 13. The ring 28 may be made of any suitable material such as metaland plastic and preferably is quite thin so that it will not interferewith the proper seating of the cap 30 on the outlet.

It will be understood from the foregoing that in the preferred sequenceof assembly of the several parts of the drum, the closure disc member 13and itsassociated pan-shaped member and reenforcing ring 14 areinitially secured in position within the upper end of the body 10. Thecontainer 20 is then inserted through the open bottom end of the bodywith the outlet 22 thereof located in registration with the opening 25.With the aid of a suitable tool permitting a substantial drawing forceto be applied to the outlet 22, the latter is forced out through theopening 25 until the lugs 24 come into locking position over the edge ofsuch opening. The bottom closure disc member 13' and its associatedpan-shaped member and reenforcing ring 14 are then assembled onto thebottom end of body 10.

Instead of closing thetop end of the drum with a closure disc 13 and theassociated pan-shaped member and reenforcing ring 14, such end may beclosed by a metal top 35, in FIG. 2, that may be provided with anoff-center outlet flange 36 with the upper beaded edge of which the lugs24 engage in locking relation. The metal top 35 may be made of mildsheet steel of 26-28 gauge and is formed on its outer periphery with aU-shaped channel portion 37 adapted to snugly receive the upper end ofthe cylindrical body wall 38. The other edge of the channel portion 37extends downwardly a substantial distance to form an external flange 39enclosing the top end portion of body 38. The channel portion 37 andflange 39 may permanently be bonded or connected to the paper materialof body 38 in any suitable manner as by the employment of a suitableknown plastic glue 34, or by crimping channel portion 37 thereto. Itwill be understood, that the bottom closure disc 13 and its associatedpanshaped member and reenforcing ring 14 in the construction of- FIG. lmay also be replaced with a similar metal closure alike in all respectsto the metal top 35 except that it does not include an outlet openingsuch as is formed by the flange 35, but is continuous throughout itsarea.

In the drum of FIG. 2, the body is composed of two telescoped annular ortubular body walls 38 and 40 which are force fitted together into atight frictional lit, and the overlapping portions of which may or maynot be bonded together with a suitable plastic material. It is preferredthat body wall 38 be made from a 3-ply kraft paper tube and that bodywall 40 be made from a 5-ply kraft paper tube so that where the twowalls overlap there are eight plies of paper. The upper end of the outerwall 40 is located below the top of the inner wall 38 by a distance atleast equal to the width of the llange 39 and positioned adjacent to arolled bead 41 formed on the lower edge of such flange, thus providing avery strong, sealed joint at the top of the drum. The lower end of theouter wall 40 is turned in to form an internal annular flange 42 onwhich is seated and to which is adhesively bonded and stapled by thestaples 33, the bottom closure disc 43 of the drum. The bottom wall 43is locked against any inward movement relative to the body walls 33 and40 by the `bottom end of the inner body wall 38 which terminates shortof the flange 42 a distance approximating the thickness of the bottomdisc 43 and engages the upper Y surface of the outer peripheral portionof such bottom disc 43. The joint formed by the body wall 38, bottomclosure disc 43 and flanged end A42 of the body wall 40, is strengthenedand rendered a completely sealed joint by a bottom layer of multi-plykraft paper 44 adhered throughout its entire area by a suitable plasticmaterial to the bottom closure disc 43 and flanged bottom end of thebody wall 40. It will be noted that the bottom covering disc 44 concealsthe staples 33 and the joint formed by the flange 42 with the closuredisc 43. The staples 33 are also concealed on the interior of the ilberoverpack by a layer 45 of kraft paper adhered to the interior surface ofthe closure disc 43. As in the construction of i FIG. l Vent holes 32may be provided through the body walls 35, 40 adjacently above the innerpaper layer 45. It will be understood that instead of providing anintumed flange 42 on the otuer wall 40 and the staples 33, inner layer45, and bottom covering disc 44, the bottom of body wall 40 can be madestraight as is the body wall 10, and an associated pan-shaped member,reinforcing ring and crown staples used to secure the bottom closuredisc 43 in position in the manner of FIG. 1, in which case the twotelescoping body walls 38 and 40 can be replaced by a single body wall10, or in position against the lower end of the inner wall 38 if thetelescoping walls are retained. The telescoping wall constructionprovides an additional advantage in that it is readily adapted to theprovision of one or more handles for the drum. Thus as shown in FIG. 2ahandle 56 of suitable shape may be pivotally mounted on a bearingmember 57 which extends through a slot in the outer body wall 40 and hasinner members anchored between the two walls 38 and 40.

' The Seamless, molded plastic container 46 within the drum of FIG. 2 isconstructed substantially similar to and assembled within the drum in amanner essentially the same as the plastic container 20 of FIG. 1. Theoutlet 47 of container 46 however, may differ from the outlet 22 ofcontainer 20 by making its lower portion substantially channel-shaped tosnugly line the interior of the metal outlet flange 36 and seat on theupper beaded edge of such flange 36. The outer portion 49 of the outlet47 may be reduced in thickness and extended over the external annularshoulder 48 formed on the flange 36 and into the annular recess formedbelow such shoulder. As so constructed, the outlet 47 may be locked inposition on the flange 36 by a plastic closure 50 which is inserted intothe channel-shaped lower portion within the flange and has integrallyformed thereon a plastic (polyethylene) channel-shaped portion 51 whichencloses the exterior of the flange 36. Connected by its upper beadededge to the closure above the channel portion 51, is a metal clampingring 52 which overlies and conforms in shape to such channel portion,and which is crimped along its lower edge to lock the lower edges of thechannel portion 51 and the outer portion 49 of the outlet 47 intherecess formed by the shoulder 48 of the flange 36. The opening in theclosure 50* may be closed by a frangible wall 53.

The invention also contemplates employing other types of closures knownto the art for closing the openings in the anges of the plasticcontainers and in order that such other closures may be efficientlyutilized, the outlet ange may be given any suitable conformation.

While there has been here-inabove described and illustrated in theaccompanying drawings, preferred em- -bodiments of the invention, itwill be apparent to those skilled in the art that various changes may bemade in such embodiments without departing from the spirit of theinvention or the scope of the appended claims.

What is claimed is:

1. A shipping container that is highly resistive to rupture whensubjected to severe drop tests and rough handling, and yet isconstituted of light,krelatively inexpensive materials, said containercomprising an outer casing, and an inner container separate from saidcasing except at the outlet for the liquid contained therein, the bodyof said outer casing being composed of a plurality of convolutely woundlayers of kraft paper bonded together to form a rigid multi-ply, annulartube, a rigid disc-shaped .top wall and a rigid disc-shaped 'bottom wallclosing the ends of said casing body, said bottom wall at least havingits peripheral edge portion disposed at right angles to the annular wallof said casing body to form a right angled juncture therebetween, anannular member permanently secured to each end of said casing body andpermanently connecting the periphery of an associated end wall to saidcasing body, said top wall being provided with at least one outletopening, said inner container consisting of a seamless, molded, singlepiece of plastic material formed to provide an annular body portion, andtop and bottom walls integrally joined to the ends of said body portionby top and bottom rounded end portions, of which the bottom one at leastis curved in cross-'section through 90, and the plastic material of saidcontainer being of a thickness such that the inner container cannotperse be used to transport liquid in ,Y interstate commerce, the body ofsaid closed inner container conforming in shape to the interior of saidcasing with the bottom rounded end portion at least of said innercontainer spanning the right angled juncture of said casing bottom Walland body, and providing a cushion against shock impact on the bottomedge of said outer casing of sucient eiectiveness to protect the productholding ability of said inner container even when such bottom edge ofthe outer casing is ruptured by such shock impact, and said innercontainer having at least one outlet integral therewith and extending upthrough .the outlet opening in said top Wall, and means on said outletfor locking the latter to the rigid material forming the edge of theoutlet opening.

2. A shipping container such as dened in claim 1 in which said outercasing is provided with a vent opening permitting the ingress ofatmospheric air into the space between the inner surfaces of said casingand the exterior surfaces of said inner container.

3. A shipping container such as dened in claim 1, in which said lockingmeans on said inner container outlet is composed of outwardly projectinglocking means fixed to said outlet intermediate the length of the latterand engaging the top of said outlet opening edge to lock said outletagainst inward movement through said opening.

4. A shipping container such as deined in claim 3, in which said lockingmeans are constituted of a plurality of locking lugs of substantialthickness and rigidity, yet movable under force through said outletopening.

5. A shipping container such as de-iined in claim 3, in which saidlocking means comprises an inner portion of said outlet seated on thetop edge of said opening and an outer portion of said outlet overlyingexterior side surface portions of said top wall forming said opening,and a closure securing said two outlet portions to such top edge andsaid side surface portions.

References Cited by the Examiner UNITED STATES PATENTS 1,627,042 5/1927Mason et al. 229-56 2,454,919 11/1948 Hagan 220-63 2,557,576 6/1951Simmons 229-14 X 2,721,674 10/1955 Lazard 22063 2,746,637 5/ 1956 Toddet al. 220-63 2,798,636 7/1957 Ketchledge 220-63 2,987,216 6/1961Fletcher 220-63 X 2,989,208 6/ 1961 Gibbs. 3,054,549 9/1962 Humphrey229-14 FOREIGN PATENTS 855,644 12/ 1960 Great Britain.

860,129 2/ 1961 Great Britain.

927,866 6/ 1963 Great Britain.

111,705 4/ 1961 Pakistan,

JOSEPH R. LECLAIR, Primary Examiner.

EARLE I. DRUMMOND, GEORGE O. RALSTON,

FRANKLIN T. GARRETI', Examiners.

D. T. MOOR'HEAfD, Assistant Examiner.

1. A SHIPPING CONTAINER THAT IS HIGHLY RESISTIVE TO RUPTURE WHENSUBJECTED TO SEVERE DROP TESTS AND ROUGH HANDLING, AND YET ISCONSTITUTED OF LIGHT, RELATIVELY INEXPENSIVE MATERIALS, SAID CONTAINERCOMPRISING AN OUTER CASING, AND AN INNER CONTAINER SEPARATE FROM SAIDCASING EXCEPT AT THE OUTLET FOR THE LIQUID CONTAINED THEREIN, THE BODYOF SAID OUTER CASING BEING COMPOSED OF A PLURALITY OF CONVOLUTELY WOUNDLAYERS OF KRAFT PAPER BONDED TOGETHER TO FORM A RIGID MULTI-PLY, ANNULARTUBE, A RIGID DISC-SHAPED TOP WALL AND A RIGID DISC-SHAPED BOTTOM WALLCLOSING THE ENDS OF SAID CASING BODY, SAID BOTTM WALL AT LEAST HAVINGITS PERIPHERAL EDGE PORTION DISPOSED AT RIGHT ANGLES TO THE ANNULAR WALLOF SAID CASING BODY TO FORM A RIGHT ANGLED JUNCTURE THEREBETWEEN, ANANNULAR MEMBER PERMANENTLY SECURED TO EACH END OF SAID CASING BODY ANDPERMANENTLY CONNECTING THE PERIPHERY OF AN ASSOCIATED END WALL TO SAIDCASING BODY, SAID TOP WALL BEING PORVIDED WITH AT LEAST ONE OUTLETOPENING, SAID INNER CONTAINER CONSISTING OF A SEAMLESS, MOLDED, SINGLEPIECE OF PLASTIC MATERIAL FORMED TO PROVIDE AN ANNULAR BODY PORTION, ANDTOP AND BOTTOM WALLS INTEGRALLY JOINED TO THE ENDS OF SAID BODY PORTIONBY TOP AND BOTTOM ROUNDED END PORTIONS, OF WHICH THE BOTTOM ONE AT LEASTIS CURVED IN CROSS-SECTION THROUGH 90*, AND THE PLASTIC MATERIAL OF SAIDCONTAINER BEING OF A THICKNESS SUCH THAT THE INNER CONTAINER CANNOT PERSE BE USED TO TRANSPORT LIQUID IN INTERSTATE COMMERCE, THE BODY OF SAIDCLOSED INNER CONTAINER CONFORMING IN SHAPE TO THE INTERIOR OF SAIDCASING WITH THE BOTTOM ROUNDED END PORTION AT LEAST OF SAID INNNERCONTAINER SPANNING THE RIGHT ANGLED JUNCTURE OF SAID CASING BOTTOM WALLAND BODY, AND PROVIDING A CUSHION AGAINST SHOCK IMPACT ON THE BOTTOMEDGE OF SAID OUTER CASING OF SUFFICIENT EFFECTIVENESS TO PROTECT THEPRODUCT HOLDING ABILITY OF SAID INNER CONTAINER EVEN WHEN SUCH BOTTOMEDGE OF THE OUTER CASING IS RUPTURED BY SUCH SHOCK IMPACT, AND SAIDINNER CONTAINER HAVING AT LEAST ONE OUTLET INTEGRAL THEREWITH ANDEXTENDING UP THROUGH THE OUTLET OPENING IN SAID TOP WALL, AND MEANS ONSAID OUTLET FOR LOCKING THE LATTER TO THE RIGID MATERIAL FORMING THEEDGE OF THE OUTLET OPENING.